Lathe attachment for grinding cylinders



E. W. KOPPE.

LATH E ATTACHMENT FOR GRINDING CYLINDERS.

APPLICATION FILED APR. 14, 1919.

1,361,736. Patented Dec. 7, 1920.

2 SHEETS-SHEET l- E. W. KOPPE.

LATHE ATTACHMENT FOR GRINDING CYLINDERS.

APPLICATION FILED APR. 14. NHL

Patgnted 1m 7,1920.

2 SHEETS-SHEET 2.

UNITED STATES EARL W. KOPPE, OF KINGMAN, ARIZONA.

LATHE ATTACHMENT FOR GRINDING CYLINDERS.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application filed April 14, 1919. Serial No. 289,831.

T 0 all whom it may concern:

Be it known that I, EARL W. Korrn,"a citizen of the United States, residing at Kingman, in the county of Mohave and State of Arizona, have invented certain new and useful Improvements in Lathe Attachments for Grinding Cylinders; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to grinding devices, and it relates more specifically to an improved lathe attachment for grinding cylinders.

The main object of this invention is to generally improve upon devices of this character by providing a construction that is comparatively simple and easy to manufacture, attach and operate, and which is very efficient, strong and durable.

- Other objects and advantages may become apparent to persons who read the following details of description in connection with the accompanying drawings in which,

Figure 1 is a view partly in side elevation and partly in vertical section, illustrating my improved lathe attachment in its operative position on a lathe of ordinary construction.

Fig. 2 is a vertical sectional view, the section being taken along the line 22 of Fig. 1. n

Fig. 3 is a vertical sectional view, the section being taken along the line 3-3 of construction so that my improved lathe attachment is attachable to most every kind of lathe which carries a face plate.

My improved attachment comprises an attaching plate 7, a mandrel 8, a tubular rotor 9, an emery wheel or other suitable grinding wheel 10, a driving belt 11, a belt tightener 12, and other elements to be mentioned and described hereinafter.

The face plate 7 is preferably rectangular, as shown in Fig. 3 and the mandrel 8 has one end seated and secured in a central aperture of the attaching plate, the elements 7 and 8 being preferably united by shrinking the face plate upon the mandrel. At diametrically opposite points of the face plate, suitable apertures are provided for the re ception of stud-bolts 13, the same comprising nuts 14, whereby the attaching plate may be secured in different eccentric positions 011 the face plate 5, it being understood that the bolts 13 extend respectively through two diametrically opposite slots 6 of the face plate.

In the extreme ends of the slots 6 in which the bolts 13 are seated, a second pair of bolts are seated, the latter being shown at 15, nuts 16 thereof being effective to secure these bolts in their respective positions. Each bolt 15 has its head bored radially therethrough axial plane of the face plate 5, and therefore, when one of these adjusting screws is loosened, and the other is tightened, this operation effects a radial movement of the attaching plate and mandrel, provided that the nuts 16 are sufficiently loose on the bolts 15 to permit such radial movement or eccentric adjustment.

The rotor 9 may be provided with ball bearings, as indicated at 18, or with any appropriate form of bearings, so that it rotates freely around the mandrel 8 under the driving influence of the belt 11, it being understood that the belt transmits its motion to the rotor through the medium of a pulley 19 which forms an element of the rotor. It should be understood that while the rotor 9 is rotating about the mandrel 8, the latter is revolving through an orbit about the axis of the face plate 5, and therefore, the belt 11 is alternately tightened and slackened during these revolutionary movements.

The belt tightener 12 comprises an arm 20 and a pulley or idler 21, the latter being carried by the arm 20, this arm being pivotally mounted on a portion of the mandrel 8 between the pulley 19 and the attaching plate 7. Weights 22 may be added on a supporting rod 23 for increasing thetension of the belt 11, when necessary or desirable.

The mandrel 8 is provided with an ad justing nut 22 whereby its bearings may be adjusted, and the rotor 9 is formed with a screw-threaded joint 23 which permits ac-' cess to the nut 22' for adjustment. In other words, the rotor 9 includes a head 2a which is screw-threaded into the tubular main portion of the rotor, and this} head is also formed with a screw-threaded stud 25 on which the grinding wheel 10 is secured by means of a nut 26.

In Fig.1 an enginecylin der is generally indicated by the number 27, one .or more angleirons 28 securing this cylinder on the bed of the'lathe'.

Although I have described this embodiment of my inventionvery specifically, it is not intended to limit this invention to these exact detailsjkof constructionfland arrange ment of parts, but I am entitled to make appropriate changeswithin the scope of the inventive idea as'expressed and claimed.

WVhat I claim as my invention is A cylinder grinding attachment for a lathecomprising an attaching plate, means for releasably and adjustably connecting the attaching plate with the lathe plate, a mandrel. extending from the center of the attac'hing' plate, a hollow rotor rotatably mounted upon the mandrel, the rotor extending beyond the outer end of the mandrel and terminating short of the attaching plate and having a drive belt receiving head atits inner end, bearings for the rotor positioned wit liinthe same adjacent theends of the mandrel, means carried by the mandrel for retaining the'rotor in-place, ahead removably connectedwith theendof the rotor, a grinding element connected with the head, an arm loosely mounted upon the mandrel between the attaching plate and the inner 7 111 hand. v. y r EARL W. KOPPE. 

